CN103736883A - Pinch roll device for producing deformed steel bar - Google Patents
Pinch roll device for producing deformed steel bar Download PDFInfo
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- CN103736883A CN103736883A CN201310747403.8A CN201310747403A CN103736883A CN 103736883 A CN103736883 A CN 103736883A CN 201310747403 A CN201310747403 A CN 201310747403A CN 103736883 A CN103736883 A CN 103736883A
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- pinch roll
- steel bar
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- reinforcing bar
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Abstract
The invention discloses a pinch roll device for producing deformed steel bar. The pinch roll device for producing the deformed steel bar is mounted between a roller mill set and a pair of flying shears in a deformed steel bar production line, and particularly, the pinch roll device is composed of a motor, a gear case, an upper pinch roll and a lower pinch roll, wherein the gear case is driven by the motor, the motor comprises two output shafts, one output shaft is connected with the upper pinch roll while the other is connected with the lower pinch roll to rotate synchronously; an adjustable roll gap is formed between the upper pinch roll and the lower pinch roll. The pinch roll device enables the reinforcing steel bar end processing speed to be reduced, so that the mechanical properties of both the head and the end of the reinforcing steel bar are qualified through the end speed reduction, the difference between the mechanical properties of the head and the end of the reinforcing steel bar is lowered, the subsequent process for the reinforcing steel bar is smooth, and the later use cost is lowered; the pinch roll device is capable of realizing the acceleration for the reinforcing steel bar, and accordingly an acceleration roller way is omitted, and the energy consumption is lowered; the pinch roll device is capable of realizing the tensile pinch of the reinforcing steel bar and avoiding the S bend when rolling strong water-cooling bar, and the reinforcing steel bar quality is improved.
Description
Technical field
The present invention relates to a kind of pinch roll apparatus, relate in particular to a kind of pinch roll apparatus of producing for screw-thread steel.
Background technology
Large specification screw-thread steel generally refers to spiral shell 25 ~ spiral shell 50, its rolling mill practice generally all needs to adopt the arrangement of off line frame, final pass from accelerate roller-way away from, therefore at reinforcing bar, depart from after milling train completely, just lack the power advancing, in the case, need to it, constantly accelerate by accelerating roller-way, can guarantee its normally upper cold bed.Namely, near the part of reinforcing bar afterbody, its speed of advancing is just faster; Large gauge ribbed bar, the acceleration of its afterbody just must be higher.
The production technology of hot-rolled high-strength screw-thread steel mainly contains three kinds of modes such as microalloying, Ultra-fine Grained controlled rolling and controlled cooling, quenching Self-tempering at present.
Wherein, while adopting quenching Self-tempering rolling English mark screw-thread steel, must adopt high strength to wear water cooling after rolling, generally on reinforcing bar, cold bed temperature is only 500 ~ 580 ℃.
After rolling, wear in water cooling process, reinforcing bar afterbody, after departing from milling train, owing to not stopping to accelerate, causes reinforcing bar by caudal part, and its mechanical property is just lower.When serious, the difference of afterbody and head often reaches 120 ~ 150MPa.And the inner quality standard of picture English mark B500B requires yield strength within the scope of 530 ~ 650MPa, therefore very easily occur that the Local Mechanical Property of reinforcing bar is defective, also exist and produce the adverse effect wayward, stocking Mechanical Fluctuation is large.
Summary of the invention
In view of the defect that above-mentioned prior art exists, the object of the invention is to propose a kind of pinch roll apparatus of producing for screw-thread steel.
Object of the present invention, to be achieved by the following technical programs: the pinch roll apparatus of producing for screw-thread steel, be located between the rolling unit and flying shear on screw-thread steel production line, it is characterized in that: described pinch roll apparatus is comprised of motor, gear-box, top pinch roll and bottom pinch roll, wherein gear-box is driven in motor and is had two output shafts, and two output shafts connect respectively upper and lower pinch roll and synchronously rotate, between described top pinch roll and bottom pinch roll, there is the adjustable roll gap of distance.
Further, described pinch roll apparatus is provided with casing in upper and lower pinch roll and gear-box outside, and along screw-thread steel, pinches the both sides of the corresponding Roll-gap position of casing described in direction and be equipped with respectively front guide and guard and rear guide and guard.
Further, described bottom pinch roll constant height, and top pinch roll connects cylinder and is driven relative to bottom pinch roll and move adjusting roll gap.
Further, described pinch roll apparatus is located at 2 meters～2.3 meters of flying shear front-side.
After pinch roll apparatus application implementation of the present invention, there is following many-sided advantage.
1, can add and hold reduction of speed reinforcing bar afterbody, guaranteed the accurate location of cold bed on reinforcing bar, reduced reinforcing bar and because tailing is short, do not gone up the phenomenon of cold bed, afterbody reduction of speed has guaranteed that steel bar end tail mechanical property is all qualified, has improved lumber recovery, reduced percent defective and workman's labour intensity, dwindled the poor mechanical property end to end of reinforcing bar simultaneously, realized the close limit of mechanical property and control, thereby yield strength integral body is controlled to lower limit, be conducive to reinforcing bar following process, reduced later stage use cost.
2, can accelerate function to reinforcing bar, without finish rolling part is all replaced by acceleration roller-way, thereby save the replacing time, alleviate workman's operation labor intensity, this function can be omitted longer acceleration roller-way simultaneously, has reduced energy consumption.
3, the tension force that can realize reinforcing bar pinches, and while preventing that rolling from wearing by force water reinforcing bar, large because wearing water resistance, reinforcing bar onward impulse is little, causes reinforcing bar to occur " S " curved phenomenon, has improved steel bar quality.
Accompanying drawing explanation
Fig. 1 is that the present invention is for the structural representation of the pinch roll apparatus of screw-thread steel production.
Fig. 2 is that the present invention is for the side schematic view of the pinch roll apparatus of screw-thread steel production.
The specific embodiment
Below just accompanying drawing in conjunction with the embodiments, is described in further detail the specific embodiment of the present invention, so that technical solution of the present invention is easier to understand, grasp.
As shown in Figure 1 to Figure 2, the pinch roll apparatus of producing for screw-thread steel, be located between the rolling unit and flying shear on screw-thread steel production line, especially, pinch roll apparatus is comprised of motor 1, gear-box 2, top pinch roll 3 and bottom pinch roll 4, wherein gear-box 2 is driven in motor 1 and is had two output shafts, and two output shafts connect respectively upper and lower pinch roll and synchronously rotate, and has the adjustable roll gap 5 of distance between top pinch roll 3 and bottom pinch roll 4.
Wherein, pinch roll apparatus is provided with casing 6 at upper and lower pinch roll and gear-box 2 outsides, and is equipped with respectively front guide and guard 7 and rear guide and guard 8 along the both sides that screw-thread steel pinches the corresponding roll gap of direction casing 65 positions.
In addition, bottom pinch roll 4 constant height, and top pinch roll 3 connects cylinder 9 and is driven relative to bottom pinch roll 3 and move and regulate roll gap 5.
Finally, pinch roll apparatus is located at 2 meters～2.3 meters of flying shear front-side, and comparatively preferred scheme is to arrange at approximately 2.15 meters of of 3# flying shear front end.
Control principle of the present invention: pinch roll apparatus is two drive mechanisms, by motor driven gear case, drives two output shafts, is transferred to respectively upper and lower pinch roll, makes its rotation; While setting the roll gap of upper and lower pinch roll, bottom pinch roll adopts screw thread rotation location, guarantees highly constantly, and top roll is from air cylinder driven toward pressing down the object that reaches adjustment roll gap.
The preferably applicable specification of pinch roll apparatus of the present invention: applicable specification: φ=16～22 2 cutting, φ=25～50 single line; Pinch roll size: length is 180mm, φ=320mm; The finished product speed adapting to: 2.4m～18m per second; 200～400 ℃ of pinch roll place reinforcing bar temperature.
Embodiment one: realize afterbody clamping, improve mechanical property.
This control mode is mainly used in the control aspect of mechanical property such as afterbody such as screw-thread steel such as mark such as large specification English such as spiral shell 28～spiral shell 40 grade, and main purpose is exactly to improve the afterbody mechanical property of reinforcing bar.
The enforcement parameter of control mode is as follows:
1. method of clamping: spiral shell 28～spiral shell 40 is carried out to afterbody and pinch.
2. pinch roll intermesh determination: upper and lower pinch roll is plain-barreled roll, bottom pinch roll adopts screw thread rotation location, guarantees highly constant.Adopt air cylinder driven top pinch roll to regulate roll gap, the roll gap of setting is advisable with hand stretchy reinforcing bar, hyperbar be as the criterion not damage rebar surface quality (generally, air pressure is 0.3～0.4MPa).
3. the Speed Setting of pinch roll: pinch roll apparatus regulates linear velocity by motor, leading coefficient settings scope is 1.03～1.13, guarantees that the linear velocity of pinch roll is not less than the linear velocity of finisher, but not higher than the linear velocity of flying shear.
Pinch roll linear velocity during lower than finished product speed, easily causes reinforcing bar to occur that serpentine is crooked; When linear velocity is too high, easily make again rolled piece produce plastic deformation, affect its finished size; And very likely cause flying shear to occur twining the accident of cutting.
4. the delay adjustments of pinch roll:
Clamp time delay: clamp time delay with the signal that is cut into of last cutter of flying shear.Time delay formula is S=(L-L1)/V, wherein L: be the length mean value of last cutter of reinforcing bar, and L1: flying shear is to distance (the spiral shell 28:30m of finisher; Spiral shell 32:39.5m; Spiral shell 40:49.7m; ), V: the finisher linear velocity of this specification while getting rolling.
Unclamp time delay: in 1～2 second after reinforcing bar afterbody departs from pinch roll, pinch roll unclamps.
Effect after this corrective measure is implemented:
1. the variation of mechanical property:
As can be seen from the above data, the mechanical property of reinforcing bar is poor end to end presents downward trend; Within steel bar end tail poor mechanical property can be controlled at 40MPa substantially now, realized the close limit of mechanical property and controlled.
2. the variation of the condition of production:
A. after using reinforcing bar afterbody being clamped to reduction of speed, guaranteed the accurate location of cold bed on reinforcing bar, reduced reinforcing bar and because tailing is short, do not gone up the phenomenon of cold bed;
B. pinch roll can unclamp rapidly after reinforcing bar afterbody is clamped to certain hour, and the reinforcing bar after unclamping can accelerate, under the effect of roller-way, to go up fast cold bed.General can not cause before and after the phenomenon that knocks into the back of two reinforcing bars, thereby can shorten into steel off time, improved output.
C. use after pinch roll afterbody clamping reduction of speed function, make the above specification of spiral shell 32 also can realize normal production without going out finished product from K1 passage, thereby be conducive to steady production.
3. improved economic benefit:
A. guaranteed that steel bar end tail mechanical property is all qualified, improved lumber recovery, reduced percent defective and workman's labour intensity;
B. dwindled the poor mechanical property end to end of reinforcing bar, realized the close limit of mechanical property and control, yield strength integral body can be controlled to lower limit, be conducive to reinforcing bar following process, reduced client's use cost, thereby improve the market competitiveness of my company's English mark screw-thread steel;
Embodiment two: realize whole process and pinch, increase the power of cold bed on large gauge ribbed bar.
Spiral shell 50 and circle 50 above specification reinforcing bars final pass in roll, during rolling, finish rolling is partly sky mistake.In the case, need to all change finish rolling part into acceleration roller-way, rolled piece is accelerated, can guarantee cold bed on rolled piece.
But as pinch roll is dropped into, reinforcing bar is carried out to whole process and pinch, just can make reinforcing bar go up smoothly cold bed, and need not all be replaced by acceleration roller-way to finish rolling part.
(1) the enforcement parameter of this control mode is as follows:
1. pinch mode: spiral shell 50 and circle 50 above specification reinforcing bars are carried out whole process and pinched.
2. the intermesh determination of pinch roll: the intermesh determination of this control mode is consistent with pinch roll intermesh determination in above-described embodiment one.
3. the Speed Setting of pinch roll:
The linear velocity of a pinch roll is adjustable control mode.
The leading coefficient settings scope of b before rolled piece does not depart from milling train is 1.03～1.08, and this coefficient can not be too little, guarantees that pinch roll linear velocity is not less than product line speed, avoids workpiece measurement to change and bending; But can not be too large, prevent that reinforcing bar from producing plastic deformation.
The leading coefficient settings scope that c departs from after milling train is 1.3～1.5, and this coefficient must obtain greatly, to guarantee that reinforcing bar goes up cold bed as early as possible.
4. the delay adjustments of pinch roll:
Clamp time delay: clamping time delay, to take the heat inspection signal that flying shear place records be signal, starts to pinch.Leading coefficient is now 1.03～1.08;
Until reinforcing bar, depart from completely after finisher, now leading coefficient settings is 1.3～1.5, to guarantee cold bed on reinforcing bar.
(2) this corrective measure effect after implementing:
While 1. changing spiral shell 50 and round steel 50 above specification, without again finish rolling part being all replaced by acceleration roller-way, thereby save the replacing time, alleviated workman's operation labor intensity;
2. use this function just can realize large gauge ribbed bar and go up smoothly cold bed, compare the acceleration roller-way of more than 40 meter long, reduced power consumption.
Embodiment three: realize tension force and pinch, eliminate " S " curved phenomenon of reinforcing bar.
When water reinforcing bar is worn by force in rolling, large because wearing water resistance, reinforcing bar onward impulse is little, easily causes on the contrary reinforcing bar to occur " S " curved phenomenon, has had a strong impact on the quality in kind of product.
In the case, the pinch roll that comes into operation, sets certain tension force to the reinforcing bar of wearing in water by force, guarantees that serpentine bending does not occur for it, strengthens the power that it wears water pipe region.Each setting parameter of its pinch roll apparatus is consistent with above-described embodiment two each parameters.
Visible by above description: to apply pinch roll apparatus of the present invention, can add and hold reduction of speed reinforcing bar afterbody, guaranteed the accurate location of cold bed on reinforcing bar, reduce reinforcing bar and because tailing is short, do not gone up the phenomenon of cold bed, afterbody reduction of speed has guaranteed that steel bar end tail mechanical property is all qualified, improved lumber recovery, reduced percent defective and workman's labour intensity, dwindled the poor mechanical property end to end of reinforcing bar simultaneously, realizing the close limit of mechanical property controls, thereby yield strength integral body is controlled to lower limit, is conducive to reinforcing bar following process, reduced later stage use cost; Can accelerate function to reinforcing bar, without finish rolling part is all replaced by acceleration roller-way, thereby save the replacing time, alleviate workman's operation labor intensity, this function can be omitted longer acceleration roller-way simultaneously, has reduced energy consumption; The tension force that can realize reinforcing bar pinches, and while preventing that rolling from wearing by force water reinforcing bar, large because wearing water resistance, reinforcing bar onward impulse is little, causes reinforcing bar to occur " S " curved phenomenon, has improved steel bar quality.
The present invention still has numerous embodiments, and all employing equivalents or equivalent transformation and all technical schemes of forming, within all dropping on protection scope of the present invention.
Claims (4)
1. the pinch roll apparatus of producing for screw-thread steel, be located between the rolling unit and flying shear on screw-thread steel production line, it is characterized in that: described pinch roll apparatus is comprised of motor, gear-box, top pinch roll and bottom pinch roll, wherein gear-box is driven in motor and is had two output shafts, and two output shafts connect respectively upper and lower pinch roll and synchronously rotate, between described top pinch roll and bottom pinch roll, there is the adjustable roll gap of distance.
2. the pinch roll apparatus of producing for screw-thread steel according to claim 1, it is characterized in that: described pinch roll apparatus is provided with casing in upper and lower pinch roll and gear-box outside, and along screw-thread steel, pinch the both sides of the corresponding Roll-gap position of casing described in direction and be equipped with respectively front guide and guard and rear guide and guard.
3. the pinch roll apparatus of producing for screw-thread steel according to claim 1, is characterized in that: described bottom pinch roll constant height, and top pinch roll connects cylinder and is driven relative to bottom pinch roll and move adjusting roll gap.
4. the pinch roll apparatus of producing for screw-thread steel according to claim 1, is characterized in that: described pinch roll apparatus is located at 2 meters～2.3 meters of flying shear front-side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747403.8A CN103736883A (en) | 2013-12-31 | 2013-12-31 | Pinch roll device for producing deformed steel bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747403.8A CN103736883A (en) | 2013-12-31 | 2013-12-31 | Pinch roll device for producing deformed steel bar |
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| CN103736883A true CN103736883A (en) | 2014-04-23 |
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| CN201310747403.8A Pending CN103736883A (en) | 2013-12-31 | 2013-12-31 | Pinch roll device for producing deformed steel bar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106181178A (en) * | 2016-08-16 | 2016-12-07 | 建科机械（天津）股份有限公司 | A kind of steel reinforcement cage main muscle Automatic-clamping feed arrangement |
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| GB191016714A (en) * | 1910-07-13 | 1910-11-24 | George Harrison | Improved Means for Delivering Bars from Rolling Mills. |
| GB981628A (en) * | 1961-01-18 | 1965-01-27 | Schloemann Ag | Improvements in delivery roller conveyors for strips |
| CN1526487A (en) * | 2003-02-12 | 2004-09-08 | Ħ�����蹫˾ | Pinch roll parts |
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| CN102896158A (en) * | 2012-11-22 | 2013-01-30 | 江苏永钢集团有限公司 | Rolling guiding and guarding device for pinch roller |
| CN102962266A (en) * | 2012-12-07 | 2013-03-13 | 陕西钢铁集团有限公司 | System for feeding bars to cooling bed at high speed in short distance |
| CN203737902U (en) * | 2013-12-31 | 2014-07-30 | 江苏永钢集团有限公司 | Pinch roll device for deformed steel bar production |
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2013
- 2013-12-31 CN CN201310747403.8A patent/CN103736883A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191016714A (en) * | 1910-07-13 | 1910-11-24 | George Harrison | Improved Means for Delivering Bars from Rolling Mills. |
| GB981628A (en) * | 1961-01-18 | 1965-01-27 | Schloemann Ag | Improvements in delivery roller conveyors for strips |
| CN1526487A (en) * | 2003-02-12 | 2004-09-08 | Ħ�����蹫˾ | Pinch roll parts |
| CN1974043A (en) * | 2006-12-08 | 2007-06-06 | 鞍钢股份有限公司 | High-speed wire rod mill pinch roll outlet rolling guide plate |
| CN102896158A (en) * | 2012-11-22 | 2013-01-30 | 江苏永钢集团有限公司 | Rolling guiding and guarding device for pinch roller |
| CN102962266A (en) * | 2012-12-07 | 2013-03-13 | 陕西钢铁集团有限公司 | System for feeding bars to cooling bed at high speed in short distance |
| CN203737902U (en) * | 2013-12-31 | 2014-07-30 | 江苏永钢集团有限公司 | Pinch roll device for deformed steel bar production |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106181178A (en) * | 2016-08-16 | 2016-12-07 | 建科机械（天津）股份有限公司 | A kind of steel reinforcement cage main muscle Automatic-clamping feed arrangement |
| CN106181178B (en) * | 2016-08-16 | 2018-02-09 | 建科机械（天津）股份有限公司 | A kind of steel reinforcement cage cage bar Automatic-clamping feed arrangement |
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Application publication date: 20140423 |